Sifter.



M. LIEBERMAN. SIF'TER.

APPLICATION FILED SEPT. 8. 1917.

L26OA09. Patented Mar. 26, 1918.

" fis rarraiigedft' be MOSES LIEEERMAN, OF `W'EST ORANGE, NEW JERSEY, ASSIGNGR TO F. & L'. 'MANUFAC- TUBING`CO., A COPARTNERSHIP COMPOSED OF SAID MOSES HYMAN BACHMAN, F WEST ORANGE,

'LEBERMAN AND NEXV JERSEY.

sIF'rnR.

Specification of Letters Patent. Patented imita. 265.19918.

Application filed September 8,1917. Serial No. 190,292.

To all lwhom it may concern:

Be it known that I, Moses LIEBERMAN, a subject of the Emperor of Austria, residing at 2 Central avenue, Test Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Im provements in Sifters, fully described and burned coal from the ashes. The principalobject of iny invention is to provide a device of this character which is more eiiicient in action than the devices heretofore known. Another object of my invention is to provide a sifter which may be' placed and operated in the ash pit of a stove or lfurnace and which when operated will not produce an objectionable spread of dust therefrom to the surrounding atmosphere-` A full understanding of the invention can best be given by a detailed description of a. construction embodying Vthe saine in an movable parts thereof beingshown in dotted thesaid device rest closely against the inner approved form, and such a description will now be y given iii connection with the accom panying drawing showing an approved construction, and in which zy Figure 1 isa view representing a range having the sifter positioned therein, the range being shown partly in side elevation and partly broken away so as vto show the sifter, which latter is shown in longitudinal section taken ony line 1-1 of Fig. 2, the

lines in their extreme rear-positions;

Fig 2 is a plan view offthe sifter; and Fig. 3 is a cross-sect-ion thereof taken' on line 3-3 of Fig. 2. ,c y The range 1, as shown, isof the. usual and 'familiar construction andfcontains the, usual grate f2- belowwwhich` is 'the ash pit wliiC-h'` closed` atthe frontthereof bvadoor 4.1iiiiged to the front oftherange'.

llievsifter comprises a lower pan 5, which yat the` top, The haeltA and the` parv allel side walls areL of' thefsameheight, but

the front .wallr isI of lessV heightv so 1 as to Ag rovide between the :side walls. and 'iii the ront of the pan an opening tlii'oi'iglfwhich wardly below i has. botto1n,qback, side'pand lfront,.walls and *isfopen the screening device 7 may bereadily slid, as hereinafter described. The top" of the front wall is desirably rounded olf orbeaded, as shown at S, so as to provide a smooth upper edge on the said wall and also to strengthen the said wall. The rear and side walls are also desirably rounded off or bead ed at `their upper edges as shown atI 9, 10 and 11 respectively. The pan vmay beinade of any suitable material, and is inost desirably made of sheet metal. suitable handle l2 for the pan 5 is desirably provided at the front thereof. f

- The screening device 7 comprises a frame having a` front wall lll, parallelside walls l5 and 16 and a rear wall .17. rlhe said frame is open at the top and bottoni and if: provided with means such as the outward@i directed anges 18 and 19 at the upper edges of the side walls thereof, whereby the said frame and the parts carried thereby may be supported from the upperedges of the side walls of the pan 5 for sliding movement into and out of operative position with respect to the said pan. In. the construction shown, the beaded upper portions of the side walls of the pan forni veryeiiicient rails along which the flanges 18 and l19 may be slid. The upper edgev of the rear wall of the screening device is desiiably flanged, as

.. shown at 20, and the upper edge of the .front wall of said device vis desii'ably rounded od or beaded as shown at 21. "'Wplien the screen-- ing device is in operative position within the pan 5, the rear wall thereof rests closely against the inner surface of the rear wall of the said pan with the flange 2 0 extending over the latter wall,v and the side walls'of surface of the side walls of the pan. The

front wall of the said frame extends downthe side and rear walls thereof as shown at 22, the extension 22 of the front wall forming a shield arranged to exftend downwardly belowtheupper edge ef the font wallet the' pan and VAtofengage the y,outer surface thereoffrorn one side edge thereof tothe other. The liront wall of the frainelof the 'screening' device also engages the front ed gesof the side walls of the pan `throughout the' distaiic'efroni the tops of thesaid edges' to the top of the front wall of the pan, oriinother words, throughout the height 0f the opening in the front of the 4the device 7.

pan. lVitl'i this construction, the traine its closely into the 'pan 5 and no space is left between them for the escape of dust troni thepan 5. A suitable handle 13 may be. providedI on the front wall of the traine of The said traine is made of any suitable material, most desirably ot sheet metal.

yiounted within the said traine` are the plurality of i'atscreens 25, 26 and 27. rlhe screen 26 in its normal position, as shown in .full lines in Fig. l, is horizontal and parallel to the bottom ot' the pan The said Screen is pivotally connected, as by pivot .rods 28 and 29, to the end screens 25 and 27, which latter are pivotally supported, as by .pivotV rods 30 and 31, tothe sides of the frame' adjacent the top andftlie respective ends thereof. lVith this construction, the screens 25 and 27 serve to support the screen 26. Each of the screens is, as shown in Fig.

2, most desirably made of suficient width to extend closely adjacentto the side walls and 16 of the frame; so that thesaid lscreens together with the said walls form al pocket or receptacle in which the unburned coal and ashes or other material to be sifted or screened is supported. ln the construction shown, the end screens and 27 extend f downwardly and inwardly at an angle to the bottom screen 2G, the axes of the pivots 28 and.29 being parallel with each other and also with the parallel axes of the pivots 3() and 31', but being arranged closer to 'each other than the axes of the pivots 30 and 31.

" The pocket or receptacle formed by the of .the sitter.

screens` and the side members of the frame is "eccori'lingly 'of less length at the bottom j than at'the top. This-construction is found to'give the best results in practice.

For moving the screens to agitate the ina-` ieiial carried by the screening device, I moet desirably employ an actuating member 32 which 'is operable from a point in front In the construction shown, this member is in the form of a rod which is pivotally connectedat one end to the pivot 28. as by being bent around the'latter,

and which extends adjacent its forward end through an opening 33 in the front wall of the frame of the screening device. This rod flesh-ably is provided'iwith means, such as the. loop 34, at its forward end Jfor grasp ing;A the rod to move the saine backwardly and forwardly. rllie rod, as shown, is formed with a longitudinally extending front portion 35', an upwardly extending portion 36 and an inclined portion 37 extending from the upper end of the portion 36 to the pivot The object of offsetting the rod, as shown at 86 and 37, is to permit the bottom screen 26 to move upwardly and to different angularpositions in back of the portion' 36 of the rod without obstruction from its normal position, the inclination of V the rod being changed only avery little during the movement thereof. The relative positions ot the parts when the actuating rod has been moved rearwardly to its extreme position .shown in dotted lines in F ig. 1. The screens most desirably vetnployed b v in e are in the form of grids. Referring more particularly to Fig. 2, the end screens or grids 25 and 27 are each formed of a straight flat bar 40 closely adjacent one of the s ide walls of the frame of the screening device and ay plurality of bars 41 paral lel to each othert0 the bar 40 and to the side walls of the'said frame. Each of the bars 41 has its ends bent into a U shape, as

shown, so as .to provide portions 42 which serve as spacing devices for the bars. The pivots 28 and 80 extend through the sides 'of the U-shaped portions at the respective ends of the bars 40 and 41 of the screen 25, and the pivots 29 and 31, `extend through the sides of the U-shaped portions of the bars 40 and 41 of the screen 27. The bottom or middle screen 27 is formed of a number of straight bars 44 parallel to each other and to the sides of the frame of the screening device and extending fromthe pivot 28 to the pivot 29. The latter pass through'the respective ends of the said bars. These bars are spaced apart double the distanceot the members 4l. Between each adjacent pair of bars 44 are arranged two bars 45 and 46 respectively. Each'o'f the vbars 45 has an end portion through which the pivot 28 passes,

the said end portion being arranged on' the said pivot between adjacent bars 41 of the spacing portion 47 through the sides of which a central rod 48 parallel to the pivot rods 28 and 29 passes. Each of the bars 46 has one end portion through which the pivpt 29 passes, the said end portion being positioned between the U-shaped spacing devices 42 on adjacent bars 41 of the screen 27. The

opposite end of each of the bars 46 is bent.

to provide a U-shapedv spacing portion 49 through thesides of which the rod 48 passes. The outer sides of the U-shaped parts 47 and '49 bear against adjacent bars44 and the ,opposite sides of said U-shaped portions are in contact with each other, so lthat the bars 44, 45 and 46 are firmly held in proper 41, are arranged with their broad surfaces vertical so that the coal and ashesor other material to be sifted is supported upon the he other end portion of each Y' of said bars is bent to proif'ide a Ushaped- 'iso linost desirably stamped out of sheet metal.

In operationthe screening device is arranged within the top of the pan 5, as shown "inthe drawing, and the sifter is then placed in the ash pit of the stove, range or furnace, as shown. `The loop 34C may project slightly in front ofthe front wall of they stove, as shown, without interfering with the closing of the door 4; as the latter, as is common, is bulged outwardly so as to provide a hollow inner portion into which the said loop may project. The ashes and unconsumed coal .which fall from the grate drop into :the sifter, some ofthe ashes at the same time fallingv directly through the screens25,

i 26 and 27 into the pan 5 below. A large gea part of the ashes and the unburned coal will, however, collect in the pocket or receptaclej formed by the screens 25, 26 and 27 ,and the side walls 1,5 and 16 of the supporting frame therefor. Vhen it is desired 'to separate the ashes and the unburned coal 1n the said. pocket' or receptacle, it is only necessary toopen. the door e of the range or otherstove or` furnace and to move the member 32, as through the loop 34, vigorously backwardly and forwardly., During this operation the screens 25, 26 and 27' are moved .relatively to each other :about the pivots 28 and 29. f Each forward movement of the operating .member 22 moves the 'screens 25 and -26 toward and finally into alinement with each other, at the same time moving the -screens 26 and 27 farther out of alinement with eachother. 'Each rearward movement of the l sa-id operating member ,moves thefscreens 26 and 27 toward and finally into alinement with each other` and the screens 25 and 26 farther out of aline* ment'with'each other, as shown in dotted lines in Fig. 1. .Through this movement of the screens, the` material supported thereon is thoroughly agitated, the movement of the screens 25 and 26 on the forward movement of the member 32 throwing the said material violentlyupwa'rdly and forwardly and 'the movementlof the screens 26 and 27 on the rearward movement of the said member throwing the 'said material violently upwardly andrearwardly. y.The tendency of .the'larger and heavier particlesto settle at 'the bottomfof the material and to clog` up the' screens so'as to pieventfthe passage therethrough of' the ashes'or lighter mate-` rial, which interferesgreatly fwith the effi-71.`

y iny general use,f. ,i

Another result-i:

cientaction of." screens now' vis accordingly overcome. u of the thorough agitating action obtained `with my, inventioir'is that, as-the unburned coal o r Vheavier particles arethrown to the top heavier particles and to pass freely into the same, said screensbeirg and the ashes" or lighter particles are f free to settle through the unburned =coal or;`

device and t-he pan oso that the escape of dust between the same is prevented.' T he inclined position. of the end `screens also assists'in the thorough separation of the unburned coal and ashes.

After the member 32 has been reciprocated sufficiently to cause the ashes -to be sufficiently separated from the unburned lcoal, the screening device may be slid forwardly on the rails 10 out of the pan 5, and the unburned fuel placed directly upon the 'fire or in a suitable receptacle. The ashes from the pan 5 may be immediately placed in a suitable receptacle, or, if desired, the said pan may be permitted to remain in the ash pit until a sufficient amount of ashes accumulates therein to fill the same. After the desired disposition has been made of the unburned fuel and the ashes or either of them, the sifting device is again slid backward upon the rails 10 into operative position within the pan 5, and, if desired, the door et closed. i i

I have found that with my invention unburned coal may be separatedl from ashes not only very conveniently but also .very rapidly, and also, as hereinbefore explained, without the production of objectionable dust. The device is of simple and cheap construction and also durable. Although the device is primarilyT intended for the separating of unburned coal and ashes, it is evidently adapted for screening various materials. Many modifications may be made in'the construction shown without departingfrom the spirit of the invention.`

Vhat is claimed is:

1. A sifter comprising a plurality of pivotally connected screens formed 'with spaced supporting bars stamped from sheet metal and arranged edgewise` 2. A sifter comprising a movable bot-tom screen, screensl pivotalljy connected Vwith said bottom screen at opposite edges thereof and extending upwardly from the same, said screens being formed with spaced supporting bars stamped from sheet metal and arranged edgewise, and stationary"walls coacting with said screens to foiin a receptacle for the material to be sift'ed."l f 3..,A sifter compri screen, andend thereof and extending rate spaced sheet metaly ranged edgewise, and' pivoted to said bottoi ing- ,through thel. 4 said end and bottom` s 4. .A sitter comprising a Yframe, end screens pivoted to opposite walls thereof, a bottom screen p ivoted to said end screens, and means for moving said screens relatively to said frame' in opposite directions from their normal positions Aof rest, said means comprising a member extending from the juncture of said bottom screen and one 'of said end screens along said bottom screen and through said frame.

5. A sitter comprising a frame, a screen supported from said frame for movement to different angular positions with respect to said frame, and means lfor moving said screen relatively to said frame, said means comprising a member connected to said screen at the rear thereof and extending along the saine and through the said f ame, said member having an oilset portion inclined away from saidscreen to avoid interference thereof with said screen upon the movement of the latter in opposite directions from its normal position of rest.

6. A sifter comprising a frame, 'end screens pivoted to opposite walls thereof, a bottom screen pivoted to said end screens, said screens being formed with spaced metal supporting bars arranged edgewise and one of said screens being provided intermediate the ends thereof with means for maintaining the bars thereof in proper spaced relationship, each end screen being pivoted to said bottom screen by a rod passing through the adjacent ends of bars of said end and bottom screens, and means passing through said frame for moving said screens relatively to said Aframe in opposite directions from their normal positions of rest.

7 A sifter comprising a frame, end screens pivoted to opposite walls thereof, a bottom screen pivoted to said end screens, said screens being formed with separate spaced metal supporting bars arranged edgewise and one of said screens being provided intermediatev the 4endsthereof with means for maintaining the bars thereof in proper spaced relationship, each end screen being pivoted to said bottom screen by a rod passing through the adjacent ends of bars of said end and bottom screens, and means for moving said screens relatively to said frame in opposite directions from their normal positions of rest, said means comprising a meinber extending from one of said rods along said bottom screen at an angle thereto and through said frame.

8. A sifter comprising a pan having back, side and front walls, one ofsaid walls being lower than the others, a frame having portions engaging the front, side and rear walls of said pan to avoid the escape of dust between said pan and said frame, and screening means movably mounted within said frame. and arranged closely adjacent the walls thereof, saidgframe being supported by Lasa-10e .Y r the upper edges of oppcsite'walls of said pan for movement into and out of said pan over said lower wall.

9. A sitter com rising aipan having back, i

side and front wa ls, one of said walls being lower than the others, a frame having portions engaging the iront, side and rear walls opposite walls oi said pan for movement into and out of said pan over said lower wall.

10.V A sifter eomprising'a pan having opposite Walls with parallel upper edges, and a screening device having opposite walls provided at their upper edges with means for supporting the said device from the said upper edges of said pan for movement into and out of said pan, said screening device being formed to entirely inclose said pan when in operative position with respect to the saine.

il. A sitter comprising a pan'having opposite walls p-rovided with parallel rails upon respective up-per edges thereof, and a screening device having walls engaging said first-named walls and provided at opposite upper edges thereof with means for supporting the said fdevice upon said rails for sliding movement into and out of said pan, said screening devicebeing -formed to entirely inclose the said pan when in operative position "ith respect tothe saine.

12. A sifter comprising a pan having opposite walls with parallel upper edges and a screeningdevice comprising a frame litting against said pan at the front, sides and back thereof and having opposite walls provided at their upper edges with means for supporting said device from' said upper edges of said pan for movement horizontally into and out of said pan, end screens pivoted between opposite walls of said frame, a bottom screen pivoted to said end screens, said screens being arranged closelyadjacent said frame, and means passing through said framel for moving said screens relatively to said frame in opposite directions from their normal positions of rest.

13. A sifter comprising a pan having opposite walls with parallel upper edges and a screening device comprising a frame fitting against-said pan at the front, sides and back thereof and having oppositewalls provided at their upper edgeswith means for supporting said device from. said upper edges of said pan for movement horizontally into and out of said pan, end screens pivoted between opposite walls of said frame, a bottom screen pivoted to said end screens, said screens being arranged closely adjacent said frame and being formed with separate spaced supporting bars arranged edgewise, and means pass- .through said frame for moving said .screens relatively to said frame in opposite directions from their normal positions of .-positewalls with parallel upper edges and a screening device comprising a frame fitting against said pan at the front, sides and back thereof and having opposite walls provided at their upper edges With means for supportingisaid device from said upper edges of said pan for' movement horizontally into and out of said pan end screens pivoted betweenopposite walls of said frame, a bottom screen pivoted to said end4 screens, said screens being arranged closely adjacent said frame-,and being formed With spaced supportingbars arranged edgewise, said bottom` screen being provided intermediate its endswith means -for holding the bars thereof in proper spaced relationship, and means for moving said screens relatively to said frame in opposite directions from their normal positions of rest, said moving means comprising a rod extending from the juncture of said bottom screen and one of said end screens along said bottom screen and through said frame.

15. A screen comprising a middle and end lrods spaced apart and parallel to each other,

a bar connected to said middle and end rods to prevent movement thereof transversely with respect to each other, and a bar connecting each of said end rods to said middle rod, said last-named bars having at their inner ends portions bent to form spacing means. y

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

MOSES LIEBERMAN.' lVitnesses:

THERESA LEUCHS, NATHAN FRIEDMAN. 

